I was in Shanghai recently, where Twitter is blocked, and yet there were ads and billboards across town with hashtags on them.

Once in a rare while, somebody comes along who doesn't just raise the bar, they create an entirely new standard of measurement.

Twitter brings you closer. I mean, we see this over and over again from our users. It brings them closer to the action. It brings them closer to their heroes.

When I was your age, we didn't have the Internet in our pants. We didn't even have the Internet not in our pants. That's how bad it was. I know I sound like my grandfather right now. We didn't have teeth! There were no questions marks, we just had words! What was I talking about? The Internet...Not only can you not plan the impact you're going to have, you often won't recognize it when you're having it.

The way you build trust with your people is by being forthright and clear with them from day one. You may think people are fooled when you tell them what they want to hear. They are not fooled.

The Internet destroyed most of the barriers to publication. The cost of being a publisher dropped to almost zero with two interesting immediate results: anybody can publish, and more importantly, you can publish whatever you want.

Believe that if you make courageous choices, and bet on yourself, then you will have an impact.